Recent progress in fast ion studies on JET
Kiptily, V.G.; Perez von Thun, C.P.; Pinches, S.D.; Sharapov, S.E.; Borba, D.; Cecil, F.E.; Darrow, D.; Goloborod'ko, V.; Craciunescu, T.; Johnson, T.; Nabais, F.; Reich, M.; Salmi, A.; Yavorskij, V.; Cecconello, M.; Gorini, G.; Lomas, P.; Murari, A.; Parail, V.; Popovichev, S.; Saibene, G.; Sartori, R.; Syme, D.B.; Tardocchi, M.; de Vries, P.; Zoita, V.L.; Kiptily, V.G.; Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, UK; Perez von Thun, C.P.; Euratom/MPI für Plasmaphysik Association, Garching, Germany; Pinches, S.D.; Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, UK; Sharapov, S.E.; Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, UK; Borba, D.; Euratom/IST Fusion Association, Instituto de Plasmas e Fusão Nuclear, Portugal; Cecil, F.E.; Colorado School of Mines, 1500 Illinois Street, Golden, CO, USA; Darrow, D.; Princeton Plasma Physics Laboratory, New Jersey, USA; Goloborod'ko, V.; Euratom/OEAW Association, Institute for Theoretical Physics, University of Innsbruck, Austria; Institute for Nuclear Research, Kiev, Ukraine; Craciunescu, T.; Euratom-MedC Association, National Institute for Laser, Plasma and Radiation Physics, Romania; Johnson, T.; Association EURATOM –VR, Royal Institute of Technology KTH, Stockholm, Sweden; Nabais, F.; Euratom/IST Fusion Association, Instituto de Plasmas e Fusão Nuclear, Portugal; Reich, M.; Euratom/MPI für Plasmaphysik Association, Garching, Germany; Salmi, A.; Helsinki University of Technology, Association EURATOM-Tekes, Finland; Yavorskij, V.; Euratom/OEAW Association, Institute for Theoretical Physics, University of Innsbruck, Austria; Institute for Nuclear Research, Kiev, Ukraine; Cecconello, M.; Association EURATOM-VR, Division of Applied Nuclear Physics, Uppsala University, Sweden; Gorini, G.; Associazione EURATOM-ENEA sulla Fusione, IFP Milano, Italy; Lomas, P.; Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, UK; Murari, A.; Consorzio RFX - Associazione Euratom-ENEA sulla Fusione, Italy; Parail, V.; Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, UK; Popovichev, S.; Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, UK; Saibene, G.; Fusion for Energy Joint Undertaking, Barcelona, Spain; Sartori, R.; Fusion for Energy Joint Undertaking, Barcelona, Spain; Syme, D.B.; Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, UK; Tardocchi, M.; Associazione EURATOM-ENEA sulla Fusione, IFP Milano, Italy; de Vries, P.; Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, UK; Zoita, V.L.; Euratom-MedC Association, National Institute for Laser, Plasma and Radiation Physics, Romania; , ; JET-EFDA, Culham Science Centre, OX14 3DB, Abingdon, UK
Журнал:
Nuclear Fusion
Дата:
2009-06-01
Аннотация:
This paper presents recent results on fast ion studies on JET. A set of diagnostics for both confined and lost fast ions was employed for investigating the response of fast ions to MHD modes and for studying their behaviour in plasmas with toroidal field ripple and in shear-reversed plasmas. A dependence of the losses on MHD mode amplitude was deduced from the experimental data. A study of various plasma scenarios has shown that a significant redistribution of the fast ions happens during changes in the profile of the safety factor from shear-reversed to monotonic. Significant changes in the losses of ICRH accelerated protons were found to be associated with L–H confinement transitions in plasmas. After an L–H transition, an abrupt decrease in the ICRH proton losses was observed. In plasmas with an internal transport barrier, the loss of ICRH accelerated ions was found to increase as the barrier forms. Further results concerning fast ion losses were obtained during JET experiments in which the magnitude of the TF ripple was varied. The ripple losses of fusion products appear similar to classical losses, and are in agreement with modelling.
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